Wrench



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NELS HELLEM, 0F BOR'ILANID, OREGON.

WRENCH.

Application filed March 13,, 1919.

T 0 all whom it may concern: Be it known that I, NELS HELLEM, a cit zenof the Kingdom of Norway, and a resident of the city of Portland, countyof Multnomah, State of Oregon, have invented a new and usefulImprovement in \Vrenches, of which the following is the specification.

My invention has for its object to provide a simply constructed,efiicient wrench whlch is especially adapted for operating in placeswhere there is but little working room, or where, by reason of thelocation of the bolt heads or nuts in crowded places, they are hard toget at, or an ordinary wrench would be hard to manipulate.

My further object is to so arrange my wrench that it need not be removedfrom the bolt head or nut until the operation of tightening up orloosening is completed. Also to adapt my wrench for use on differentsized. bolt heads and nuts.

I attain my object by the device illustrated in the accompanyingdrawings, in which Figure 1 shows a perspective view of my wrench;

Fig. 2 is a partial side elevation with the near plate constituting thenear side of the housing of the ratchet wheel included in my wrenchremoved; I

I Fig. 3 is a larger scale section taken on line 3 in each of Figs. 1and 2.

I will describe my wrench in its preferred form without, however,desiring it to be understood that it can only be made in accordance withthe exact-details of construction hereinafter given.

The shank a is made at its handle end with an offset as at Z), in thisway providing for the more convenient use of my wrench un' derconditions where the bolt head or nut is set back. At the oppositeextremity the shank is made with an integral projection '0 constitutingone side of the housing for the ratchet wheel (Z. The shank a isprovided with an offset a having a face 0, parallel with the housingside 0 on which face is firmly secured a plate (2 by screws 7, the platec constituting the other side of the housing for the ratchet wheel (Z,and by the described construction is so spaced from the side 0 as torotatably hold the ratchet wheel without tending to bind the same andthus interfere with its free rotation. The ratchet wheel is providedwith annular recesses g on its flat Specification of Letters Eatent.

Patented May 2, 1922.

Serial No. 282,441.

firmly supporting the latter. The ratchet wheel is made with a centralrectangular hole 2' for receiving the bolt head or nut, and in orderthat my wrench may be used on bolt heads and nuts of various sizes Iprovide an insert as j, or a series of such inserts adapted to fit thesizes of the bolt heads and nuts on which my wrench is to be used. Thehousing sides 0 and e have parts cut away corresponding with theapertures of the ratchet wheel. Between the housing sides is pivoted apawl 70 on a pintle Z and a spring m tends to hold the head of the pawlin engagement with the teeth of the ratchet wheel d. The pintle Z alsoserves to hold the sides 0 and e firmly together at the same time,preventing the sides from binding with the ratchet-wheel. The shank maybe provided with a rib 42 adapted to limit the forward throw of the pawlby the spring at as illustrated in Fig. 2. The latter arrangement isconvenient in that it facilitates the assemblage of the parts.

The operation of the wrench is self-evident from its illustration anddescription above given.

I claim:

In a ratchet wrench of thecharacter described, a shank provided with anintegral.

offset portion constituting one side of the ratchet wheel housing, aplate firmly secured on said shank overlying and extending the fulllength of such offset portion, such plate constituting the other side ofsaid housing, a ratchet wheel between the sides, the ratchet wheel beingprovided on each side face with an annular recess concentric with itsaxis of

